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15-Letter Words With IOS

  • 19 words
  • All English dictionaries
  • Scrabble points
Dictionary

All 15-Letter Words With IOS 19 words

How often does IOS appear in fifteen-letter words?

Our combined English word list has 19 fifteen-letter words containing IOS. They average 21.3 points, the best is HELIOSCIOPHYTES (28 points) and 63.2% end in S.

Total words
19
Average Scrabble score
21.3
out of 28 max
Everyday words
0%
common in ordinary English
Most common ending
S
63.2% of words

Most common last letters

  • s 63.2%
  • d 10.5%
  • l 10.5%

Top vowel pairs

  • io100%
  • au5.3%
  • ia5.3%

Share of words where these two vowels sit side by side.

Rare words worth knowing

Valid in this dictionary but rarely seen in everyday English.

Highest-scoring fifteen-letter word containing IOS

h 4e 1l 1i 1o 1s 1c 3i 1o 1p 3h 4y 4t 1e 1s 1

H 4 + E 1 + L 1 + I 1 + O 1 + S 1 + C 3 + I 1 + O 1 + P 3 + H 4 + Y 4 + T 1 + E 1 + S 1 = 28 points

Double word
56 pts
Triple word
84 pts

Face value of the tiles, then the whole word on a double- or triple-word square (letter bonuses and bingos not included).

heliosciophytes

No dictionary definition on file. This is a valid game word that standard dictionaries rarely cover.

  • Scrabble US
  • Scrabble UK
  • Words With Friends

Runners-up

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15-letter words containing…

Words containing IOS by length

Longer sequences containing IOS

Each link adds one letter and keeps only combinations that have words.

Change the last letter of IOS

Trending word lists

Five-letter lists built from the letters of yesterday's Wordle answer. The set changes every day.

How to use this word list

Using IOS in the middle of a word

15-Letter Words With IOS by the numbers

15-Letter Words With IOS FAQ

How many fifteen-letter words containing IOS are there?

There are 19 fifteen-letter words containing IOS in our combined English word list. Other dictionaries give different totals, so switch dictionary at the top of the list to compare.

What is the highest-scoring fifteen-letter word containing IOS?

HELIOSCIOPHYTES is worth 28 points in Scrabble before any bonus squares. Other strong options are BIOSTRATIGRAPHY (26), RADIOSENSITIZED (26), RADIOSCOPICALLY (25).

Which rare fifteen-letter words containing IOS score well?

Uncommon but valid choices include HELIOSCIOPHYTES (28), BIOSTRATIGRAPHY (26), RADIOSENSITIZED (26), RADIOSCOPICALLY (25). Few players know them, so they can catch an opponent off guard.